<wicket:panel>
    <h3>Upgrade info:</h3>
    <div wicket:id="upgradeInfo"></div>
    <div wicket:id="requires"></div>
    <div wicket:id="upgrading"></div>
    <form wicket:id="form">
        <p>
            <input type="submit" value="Upgrade" />
        </p>
    </form>
</wicket:panel>
